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Proportional flow control valve Proportional flow control valve

STANDARDS INSTALLATION NOTES Proportional 2-way flow control cartridge
Cartridge cavity ISO 7789 Mounting type Screw-in cartridge M22 x 1,5 ◆ direct operated M22 x 1,5
CANopen DRP 303-1 Mounting position Any, preferably horizontal ◆ Q = 28 l/min ISO 7789
max
Profibus DP IEC 947-5-2 Tightening torque M = 50 Nm Screw-in cartridge ◆ Q N max = 25 l/min x II 2 G Ex db IIC T6, T4
p
= 350 bar
D
Protection class EN 60 529 M = 5 Nm knurled nut ◆ max x II 2 D Ex tb III C T80 °C, T130 °C
D
Contamination ISO 4406 x I M2 Ex db I Mb
efficiency Class I Division 1
Class I Zone 1

SURFACE TREATMENT SEALING MATERIAL
◆ The cartridge body is gas-nitro-carburised NBR or FKM (Viton) as standard, choice in the type code
◆ The slip-on coil is zinc- / nickel-coated DESCRIPTION APPLICATION
◆ The electronics housing / chassis is made of aluminium Direct operated, pressure compensated proportional flow control Proportional flow control valves are suitable for precise speed
valve in screw-in cartridge construction for cavity according to ISO control, where the load current has to be maintained constant inde -
7789. With the solenoid deenergised, the control spool is held in the pendent of the input and output pressure. These valves are suitable
closed position by a spring. The change of the electric current is for applications in explosion-hazard areas, open cast and also in
followed by a proportional volume flow change. From the input (1), mines. The screw-in cartridge is perfectly suitable for installation
the fluid flows over a throttle and a control spool to the controlled in control blocks. For machining the cartridge cavity in steel and
output (2). The pressure tight encapsulated Ex-protection solenoid aluminum blocks, cavity tools are available (hire or purchase).
coil prevents an explosion on the inside penetrating to the outside Please refer to the data sheets in register 2.13.
as well as an ignitable surface temperature.

TYPE CODE

Q N B PM22 - - / / - #
Flow control valve
Normally closed

Proportional, Ex-protection execution Ex d
Screw-in cartridge M22 x 1,5

Nominal volume flow rate Q N 3,2 l/min 3,2 16 l/min 16
8 l/min 8 25 l/min 25

Nominal voltage U N 12 VDC G12
24 VDC G24
Ambient temperature up to:
Nominal power P 15 W L15 70 °C
N
17 W L17 70 °C (only UL / CSA)
Certification ATEX, IECEx, EAC, CCC UL / CSA UL MA MA
Australia AU
Sealing material NBR
FKM (Viton) D1
Options without
amplifier M248

Design index (subject to change)
2.6-634

Wandfluh AG Postfach CH-3714 Frutigen
Tel. +41 33 672 72 72 Fax +41 33 672 72 12 sales@wandfluh.com

www.wandfluh.com Illustrations are not binding Data subject to change 6/6 Edition: 22 46 2.6-633 E www.wandfluh.com Illustrations are not binding Data subject to change 1/4 Edition: 21 21 2.6-634 E
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